%0 Journal Article
%T Times of sowing sunflower 'off season', in succession to sunflower in the cerrado tocantinense
%A Arist¨®teles Capone
%A H¨¦lio Bandeira Barros
%A Elonha Rodrigues dos Santos
%A Emerson Castro Ferraz
%J Journal of Biotechnology and Biodiversity
%D 2012
%I Federal University of Tocantins
%X The sunflower (Helianthus annuus L.) is considered a culture of great plasticity, has important characteristics liketolerance to different abiotic factors, drought and extreme temperatures. In that context the culture becomesfavorable to the safrinha, in with direct sowing optimizes the use of the earth, machines, labour and creation of jobsin the producing region. The objective of this study was to evaluate cultivars of sunflower (H¨¦lio 250 - H250, H¨¦lio251 - H251, H¨¦lio 358 - H358, H¨¦lio 360 - H360 e H¨¦lio 884 - H884) in four sowing times (EP1 -15/03/2009; EP2 -28/03/2009; EP3 - 09/04/2009 e EP4 - 01/05/2009) direct on sunflower straw, safrinha 2009, in Gurupi, South partof the State of Tocantins. The experimental design was randomized blocks in factorial scheme 4x5 (sowing time xcultivars) with three repetitions. There was significant interaction between sowing times and cultivars for all traits.There was reduction in all traits with retardation of the sowing. Highest productivity of achenes was obtained whensunflower was grown in the second sowing time. The cultivar H884 had the best performance for most of theanalyzed variables at different times of sowing.
%K Helianthus annuus
%K cultivars
%K straw
%K drought
%U http://revista.uft.edu.br/index.php/JBB/article/view/199/138